Improvement in driving-gears for hand-cars



l. D. HINCKLEY.

Driving Gear for Hand-Cars.

No. 137,922. PatentedApriHsnas,

D mi um. u uw 'um ww.

Iran STATES JAMES D. HINCKLEY, 0F ADRIAN, MICHIGAN.

IMPROVEMENT IN DRlVlNGi-GEARS FR HAND-CARS.

Specification forming part of Letters Patent No. 137,922, dated Aprill5, 1873; application filed November 13, 1872.

To all whom it may concern:

Be it known that I, JAMES, D. HINGKLEY, of Adrian, in the county ofLenawee and State lof Michigan, have invented a new 'and usefulImprovement in Driving-Gear for Hand-Cars, 85e.; and I do declare thatthe following is a true and accurate description thereof, referencebeing had to the accompanying drawing and to the letters of referencemarked there- 0n and being a part of this specitcatio'n, in which-Figure 1 is a perspective view of. a handcar fitted with my improveddrivin g-gear, with parts broken away to show its arrangement and Fig. 2is an inverted perspective view ot part ofthe bottom of the car, showingthe application of my double-cranked gear.

Like letters refer to like parts in each figure.

The nature of this invention relates to the application of two revertedcranks to a single spur gear or pulley in such a manner as to have thesame effect as if the said gear were mounted on the shaft of a two-throwcrank between the cranks, thereby enabling me to couple the pitmen-rodsto the crank-wrists close to the gear, and to render the device muchless expensive to constructthan a twothrow crank. The invention consistsin the peculiar construction and application of two reverted cranks to aspur gear or pulley for operating hand-cars, foot-lathes, or othermachines in the manner more fully hereinafter set forth.

In the drawing, A represents the deckfranie of a hand-car, under whichthe axles B are journaled, the former being the drivingaxle, carryingat,` its middle a pinion, a. G. C are two reverted single cranks, whosewristpins are secured to opposite faces of a spurgear, I), ninetydegrees apart, while theaxis of their journals is in line with the axisof the gear. The journals of the cranks rotate in bearings b b bolted tothe center-sillsof the deck-frame, and the spurgear meshes with thepinion a 0f the driving-shaft. E 1s an ordinary gallows-frame erected onthe deck-frame of the car, on top of which a rock-shaft, F, is journaledin bearings c, and to it is keyed a brake-lever, G. A shorter lever, G',has an eye in its inner end which is sleeved on the rock-shaft. To theshort arm of the lever G is pivoted a pitinan, H, whose lower end isstrapped to the wrist of the crank O. To the lever G is pivoted apitmamH, at the same distance from the fulcrum (the rock-shaft) as theother pitman. The lower end of this pitman is strapped to the wrist ofthe crank C. rIhe levers are provided with the usual brakes, by whichthe car may be driven.

The reciprocation, or, rather, the oscillation, of the levers rotatesthe drivinggear precisely in the saine manner as if the pitmen-rods wereconnected to quarter-cranks in a twothrow crank-shaft, with greatersteadiness, however, and less lateral strain, as the power may be saidto be applied directly to the gear inst'cad of at a distance from it.Besides this, a gear or pulley cannot be mounted on a shaft havingtwo-throw cranks formed in it between the cranks without making the gearor pulley i111 liialves and bolting them together on the s ia t.

The saine gearing may be employed advan` Witnesses:

C. B. JOHNSON, S. M. BABcooK.

